- Michael Neunteufel
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## Fluid-structure interaction

In this example we will have a look on how we can solve a multiphysics problem in NGSolve and the NGSPy interface. Therefore, we will consider a fluid-structure interaction problem, where the Navier-Stokes equations for the fluid part

\[\rho\frac{\partial u}{\partial t}+\rho(u\cdot\nabla)u-\rho\nu\Delta u+\nabla p = f\] \[\text{div}(u) = 0\]

and the elastic wave equation for the elastic part